Effects of functional end-group on nano-tribology characteristics of ultra-thin liquid lubricant films in hard disk drives

This paper describes the effects of functional end-group on nano-tribology characteristics of ultra-thin liquid lubricant films in hard disk drives. In the experiments, the spreading characteristics of ultra-thin liquid lubricant films have been investigated by using the disks with two kinds of lubricants which have different end-groups. The effect of molecularly thin lubricant films on nano-spacing flying head slider hysteresis behavior for touch-down and take-off process also has been studied. In addition, the behavior of two kinds of lubricants films for contact sliders has been investigated. Based on these experiments, it may be concluded that the functional end-group does affect the tribological performance of lubricants in head-disk interface.